I am very new to UE4 and I’ve been trying to use the same variable in a widget blueprint and an actor blueprint. There is a cube that has its dimensions constantly changing, and I want the player to be able to go to a certain location and input a number where they’re able to change the rate at which…

Event Dispatcher is essentially “Delegate” in C++ term. Assigning (Link phase) The event binding must be connected (It is not wired in your graph, hence not bound) Parameters on the event dispatcher must be matching with the event parameters. It is best to bind the same event once. You can also un…

Your “binding” isn’t hooked up to anything so that event “Play rate listener” is never actually activated to do anything. You need to have a sequence off your “begin play” and hook one of the execution pins into the “bind event” input execution pin.

Okay, I have the event hooked up now but it still doesn’t seem to change.

Okay I think I binded it like you said, but the rate of the timeline isn’t changing. [243868-cube-blueprint2.png]

You still lack a “Call PlayRate Event” node somewhere else. I made a new actor blueprint setup like you did and use input node to toggle play rate. Timeline node was 10s long to print its own play rate value. Input node was placed in level blueprint so I can grab the references of “test” actor easi…

My Call PlayRate event is still the same as it was in the second screenshot, but it doesn’t seem to call at all. I tested everything with Print String like you did and it seems that the cube doesn’t get the call in the first place. Do I have the target set wrong? Yours has “from Persistent Level” be…

To ensure input is not accidentally consumed by Input-Enabled Actor and Player Controller, attach print string node to ensure input actually fired. ( Input | Unreal Engine Documentation ) My target is from persistent level because it was a quick prototype by spawning it into the level and use lev…

This is what I tested (Green - Printed; Red - NOT Printed): [244037-cube-blueprint-print-string-test.png] [244038-playerinput-blueprint-print-string-test.png]

Will need to check the event dispatcher signature on the declaration. You might need to recopy the signature again by picking itself from the delegate list. If it existed, it might not be properly bound in the first place (4.17-4.18, 4.19 doesn’t have this issue) If it still doesn’t fix it, is …

I am using 4.19.2 I’m not sure what you mean by test locally

It means do you have the project somewhere to download/access and have people look into it?

Using Event Dispatchers to communicate variable between blueprints

Development Programming & Scripting Blueprint

Saffrona (Saffrona) June 12, 2018, 5:42pm 9

This is what I tested (Green - Printed; Red - NOT Printed):